h5端， 使用uni.navigateTo 从a页面跳转到b页面，再从b页面跳转回来。b页面的vue组件未释放掉

**问题描述**
[问题描述：尽可能简洁清晰地把问题描述清楚]
h5端， 使用uni.navigateTo 从a页面跳转到b页面，再从b页面跳转回来。b页面的vue组件未释放掉
**复现步骤**
[复现问题的步骤]
1. 启动 '使用vue-cli创建项目，选择默认模板，npm run serve启动项目
添加 
添加页面bar如下，
index页面添加跳转bar页面方法
'
2. 点击
'打开chrome开发者面板的memory面板，截取内存快照
点击Hello跳转到bar页面，点击bar回到index页面，执行垃圾回收,截取内存快照
再次重复上叙操作9次，执行垃圾回收，截取内存快照

'
3. 查看
每次回到原页面都有10个vue组件没有被释放掉
[或者可以直接贴源代码]

**预期结果**
期望组件都被释放到

**实际结果**
每次有10个组件泄漏

**系统信息:**
- 发行平台: h5 浏览器版本 chrome: 91.0.4472.114（正式版本） （64 位）
- 操作系统 windows10
- HBuilderX版本 未使用
- uni-app版本 [如使用Vue-cli创建/运行项目，则提供`npm run info`的运行结果]
- npm run info 结果:
> my-project@0.1.0 info D:\workspace\test\my-project
> node node_modules/@dcloudio/vue-cli-plugin-uni/commands/info.js

uni-app v3.1.18
uni-app cli v2.0.0-31920210609001

Environment Info:

System:
OS: Windows 10
CPU: (4) x64 Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
Binaries:
Node: 12.18.3 - E:\node.EXE
Yarn: Not Found
npm: 6.14.6 - E:\npm.CMD
Browsers:
Edge: 44.19041.1023.0
npmPackages:
@dcloudio/types: * => 2.2.16
@dcloudio/uni-app-plus: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-app-plus-nvue: 0.0.1
@dcloudio/uni-app-plus-nvue-v8: 0.0.1
@dcloudio/uni-automator: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-cli-shared: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-h5: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-helper-json: * => 1.0.13
@dcloudio/uni-i18n: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-migration: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-360: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-alipay: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-baidu: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-kuaishou: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-qq: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-toutiao: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-vue: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-mp-weixin: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-quickapp-native: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-quickapp-webview: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-stat: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/uni-template-compiler: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/vue-cli-plugin-hbuilderx: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/vue-cli-plugin-uni: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/vue-cli-plugin-uni-optimize: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/webpack-uni-mp-loader: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@dcloudio/webpack-uni-nvue-loader: 0.0.1
@dcloudio/webpack-uni-pages-loader: ^2.0.0-31920210609001 => 2.0.0-31920210609001
@hap-toolkit/dsl-vue: 0.6.13
@vue/babel-helper-vue-jsx-merge-props: 1.2.1
@vue/babel-helper-vue-transform-on: 1.0.2
@vue/babel-plugin-jsx: 1.0.6
@vue/babel-plugin-transform-vue-jsx: 1.2.1
@vue/babel-preset-app: 4.5.13
@vue/babel-preset-jsx: 1.2.4
@vue/babel-sugar-composition-api-inject-h: 1.2.1
@vue/babel-sugar-composition-api-render-instance: 1.2.4
@vue/babel-sugar-functional-vue: 1.2.2
@vue/babel-sugar-inject-h: 1.2.2
@vue/babel-sugar-v-model: 1.2.3
@vue/babel-sugar-v-on: 1.2.3
@vue/cli-overlay: 4.5.13
@vue/cli-plugin-babel: ~4.5.0 => 4.5.13
@vue/cli-plugin-router: 4.5.13
@vue/cli-plugin-vuex: 4.5.13
@vue/cli-service: ~4.5.0 => 4.5.13
@vue/cli-shared-utils: 4.5.13
@vue/component-compiler-utils: 3.2.2 (3.2.2)
@vue/preload-webpack-plugin: 1.1.2
@vue/shared: ^3.0.0 => 3.1.2
@vue/web-component-wrapper: 1.3.0
mpvue-page-factory: 1.0.1
mpvue-template-compiler: 1.0.13
uni-h5-vue: 2.6.10
uni-mp-vue: 2.6.10
vue: ^2.6.11 => 2.6.14
vue-hot-reload-api: 2.3.4
vue-loader: 15.9.7 (16.3.0, 15.9.7)
vue-router: 3.0.1
vue-style-loader: 4.1.3 (4.1.3)
vue-template-compiler: ^2.6.11 => 2.6.14 (2.6.14)
vue-template-es2015-compiler: 1.9.1
vuex: ^3.2.0 => 3.6.2
npmGlobalPackages:
@vue/cli: Not Found
- 设备信息 windows10 64位

**补充信息**
[可选]
[根据你的分析，出现这个问题的原因可能在哪里？]